https://repositorio.ifgoiano.edu.br/handle/prefix/217 Sun, 02 Aug 2026 19:55:12 GMT 2026-08-02T19:55:12Z https://repositorio.ifgoiano.edu.br/handle/prefix/6764 Título: AGRICULTURA VERTICAL DE PRECISÃO APLICADA A MICROVERDES DE LENTILHA E GERGELIM: TELEMETRIA AUDITÁVEL, MANEJO LUMINOSO E EFICIÊNCIA ENERGÉTICA DA PRODUÇÃO DE BIOMASSA Autor(es): Silva, Marlus Dias Primeiro Orientador: Silva, Fabiano Guimarães Abstract: This thesis investigated artificial lighting strategies and digital infrastructure applied to precision vertical farming, with emphasis on microgreens cultivated under controlled environment conditions. The work integrated two main axes: the evaluation of light spectra and temporal lighting regimes on the physiological and productive performance of microgreens, and the development of an open and auditable IoT architecture for control, monitoring, and experimental data recording in indoor cultivation systems. In the study with lentil microgreens, constant lighting regimes, especially under red, white, and RBW light, favored biomass production and energy efficiency, whereas the Gaussian regime showed greater potential to stimulate carotenoid accumulation. In the study with sesame microgreens, the Precision Vertical Farming System (PVFS) was developed and validated, enabling the execution of dynamic PPFD profiles, environmental and electrical telemetry recording, and the integration of metrics such as Areal Energy Consumption (AEC), Specific Energy Consumption (SEC), and Energy-to-Mass Efficiency (EEMS). The results demonstrated that DLI equivalence does not guarantee equivalent energy performance, with the Red–Constant treatment showing the best energy–biomass relationship. This thesis contributes by demonstrating that precision vertical farming must integrate biological response, energy efficiency, and digital traceability to achieve greater experimental robustness, reproducibility, and operational rationality. Editor: Instituto Federal Goiano Tipo: Tese Thu, 02 Jul 2026 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6764 2026-07-02T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6723 Título: DIAGNOSE DA COMPACTAÇÃO DO SOLO: ABORDAGENS METODOLÓGICAS NA PENETROMETRIA E TEXTURA Autor(es): Souza, Ítalo Rômulo Mendes de Primeiro Orientador: Severiano, Eduardo da Costa Primeiro Membro da Banca: Costa, Kátia Aparecida de Pinho Segundo Membro da Banca: Rezende, Alexandre Garcia Terceiro Membro da Banca: Ferreira, Camila Jorge Bernabé Abstract: Soil compaction is one of the main forms of physical degradation associated with the agriculture intensification in tropical environments, compromising root growth, hydrological functioning, the ecosystem services provision, and the agricultural systems sustainability. Despite its relevance, the diagnosis of soil compaction still represents a methodological challenge, mainly due to the limitations inherent in traditionally used indicators, such as soil resistance to penetration and conventional textural characterization, especially in highly weathered soils. In this context, this thesis aimed to evaluate methods for diagnosing soil compaction in tropical environments, with emphasis in the limitations associated with mechanical resistance, textural characterization, and estimation of soil compressive behavior. The research was structured in two complementary chapters. In the first one, soil resistance to penetration was evaluated in the field and in laboratory conditions, based on a database from tropical agroecosystems distributed across different edaphoclimatic regions. The results indicated a high frequency of values considered restrictive to root penetration in field assessments, concentrated predominantly in the surface layers of the soil. However, it was found that the resistance measured in situ shows high spatial and temporal variability, as well as a tendency to overestimate mechanical impedance, reflecting its strong dependence on water content, texture, and structural heterogeneity of the soil. In contrast, laboratory measurements showed greater diagnostic consistency, especially when associated with more stable structural indicators, such as relative soil density and pore system organization, demonstrating that penetration resistance should be interpreted as a complementary functional indicator rather than an isolated diagnostic criterion. In the second chapter, pedotransfer functions were developed to estimate the preconsolidation pressure of Brazilian soils representative of tropical environments, based on easily obtained physical, chemical, and mineralogical attributes. The statistical models obtained had high explanatory power, demonstrating that the compressive behavior of tropical soils is strongly controlled by the interaction between soil water content and fine fraction content, reflecting the combined influence of texture, mineralogy, and structural organization. The results also indicated that these soils have low load-bearing capacity, making compaction practically inevitable under mechanized traffic, even under apparently favorable moisture conditions. Taken together, the findings in this thesis show that soil compaction in tropical environments is a recurring structural condition, conditioned both by intrinsic soil factors and by the methodological limitations of the indicators used in its assessment. It is concluded that the diagnosis of compaction requires an integrated approach between the field and the laboratory, combining the identification of impeding layers with the structural and compressive characterization of the soil, as well as the judicious use of predictive models, contributing to more efficient management decisions and the physical sustainability of tropical agricultural systems. Editor: Instituto Federal Goiano Tipo: Tese Fri, 27 Feb 2026 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6723 2026-02-27T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6704 Título: BIOPROSPECÇÃO E POTENCIAL DE MITIGAÇÃO DO DÉFICIT HÍDRICO NA SOJA POR BACTÉRIAS PROMOTORAS DE CRESCIMENTO DE PLANTAS Autor(es): Tavares, Germanna Gouveia Primeiro Orientador: Costa, Alan Carlos Primeiro Membro da Banca: Silva, Adinan Alves da Segundo Membro da Banca: Müller, Caroline Terceiro Membro da Banca: Moura, Jadson Belém de Abstract: Soybean (Glycine max) is one of the most important agricultural commodities for global food supply; however, it frequently experiences yield losses due to environmental stresses, particularly drought. In addition, the crop has high nutritional requirements to achieve productivity levels that meet the growing global demand for food. This study investigated the potential of plant growth–promoting rhizobacteria (PGPR) to mitigate the drought effects in G. max and to enhance plant development. Initially, in vitro assays were carried out to identify functional traits of the bacteria, followed by genetic characterization. Based on this screening, 11 bacterial isolates, identified as belonging to the genus Bradyrhizobium spp., were selected according to the evaluated functional traits. Subsequently, two greenhouse experiments were carried out to simulate field conditions. The first experiment aimed to select bacteria with the greatest potential to promote the growth of inoculated plants, while the second evaluated the ability of these bacteria to enhance plant tolerance to water deficit. In both experiments, gas exchange, chlorophyll a fluorescence, photosynthetic pigments, and plant growth were assessed under well-watered and water-stress conditions, with and without inoculation using native or commercial bacteria, in addition to morphological evaluations of shoot and root systems. The results indicated that plant growth–promoting bacterial strains improved photosynthetic rates, electron transport efficiency, and root growth under both well-watered and drought stress conditions. Editor: Instituto Federal Goiano Tipo: Tese Fri, 20 Mar 2026 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6704 2026-03-20T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6513 Título: MICRO-ORGANISMOS PROMOTORES DO CRESCIMENTO VEGETAL PARA REDUÇÃO DA FERTILIZAÇÃO FOSFATADA EM SOJA E MILHO. Autor(es): Santos Junior, Jeronymo Pereira dos Primeiro Orientador: Souchie, Edson Luiz Primeiro Membro da Banca: Carlos, Leandro Segundo Membro da Banca: Ribeiro Neto, Moacir Abstract: With the expansion of agricultural frontiers and the migration of rural producers to the Cerrado, Brazil starts to break production records every agricultural year, mainly with soybean and corn crops. However, for this to happen, a great deal of research and technological development was necessary, especially in agricultural soil fertility management. The objective of this study was to evaluate the efficiency of different microbial consortia under different levels of phosphate fertilization in soybean and corn crops grown in the Cerrado. Two field trials (soybean and corn) were carried out in the 2023/24 summer harvest at the IF Goiano Experimental Area – Rio Verde Campus, GO. Both trials were randomized block designs, 3 x 5 factorial scheme (three levels of phosphate fertilization: 0, 50, and 100% of the recommended P dosage and five inoculation treatments: Azospirillum brasilense, Pseudomonas fluorescens, Azospirillum + Pseudomonas, Bacillus sp. + Paraburkholderia sp. and Priestia megaterium + Bacillus subtilis), with four replicates. Thirty-five days after emergence, in both trials, the following were evaluated: dry mass of the aerial part, roots, N and P contents in the aerial part and roots. For soybeans, the number and dry mass of nodules were also evaluated. At harvest, in both trials, the following were analyzed: mass of 1000 grains, N and P contents in the grains, and grain yield. The agronomic effectiveness of co-inoculation was proven to be a superior strategy, i.e., the combination of Priestia megaterium and Bacillus subtilis, or Bacillus and Paraburkholderia sp., or Azospirillum brasilense and Pseudomonas fluorescens is more favorable to soybean nutrition, growth, and productivity than isolated inoculation. Co-inoculation technologies (A. brasilense + P. fluorescens, Bacillus sp. + Paraburkholderia sp., and P. megaterium + B. subtilis) favor low-input systems as well as those aimed at optimizing the efficiency of conventional industrial phosphate fertilizers. The microbial isolates tested here as growth promoters acted synergistically and maximized the efficiency of phosphate fertilization in soybean crops. In corn cultivation, similarly, the co-inoculation of Priestia megaterium + Bacillus subtilis, or Bacillus sp. + Paraburkholderia sp., or even Azospirillum brasilense + Pseudomonas fluorescens enhanced corn productivity compared to the isolated inoculation of A. brasilense or P. fluorescens. Co-inoculation technologies (A. brasilense + P.fluorescens, Bacillus sp. + Paraburkholderia sp., and P. megaterium + B. subtilis) favored low-input systems as well as those aimed at optimizing the efficiency of conventional industrial phosphate fertilizers. Editor: Instituto Federal Goiano Tipo: Dissertação Fri, 05 Sep 2025 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6513 2025-09-05T00:00:00Z